Funding for this research was provided by:
European Regional Development Fund (GINOP-2.3.2.-15-2016-00009 ‘ICER’)
János Bolyai Research Scholarship of the Hungarian Academy of Sciences
National Research, Development and Innovation Office (PD_124607)
Article History
Received: 12 January 2018
Accepted: 21 February 2019
First Online: 14 March 2019